People with allergic purpura should avoid the following foods: First, foods like celery, coriander, and mushrooms that may trigger photosensitivity should be consumed minimally. Also, seafood such as crabs and shrimp, which are high in protein, should be consumed in limited quantities. Additionally, overly nourishing foods like dog meat and mutton should also be minimized, as these foods may trigger outbreaks of allergic purpura. Besides dietary considerations, individuals with allergic purpura should also avoid getting cold, prevent infections, and avoid strenuous exercise.